LOANS AND LEASES (Summary of Credit Risk Profile of Loans) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2025	Dec. 31, 2024
2025/2024	$ 560,429	$ 690,657
2024/2023	609,961	453,519
2023/2022	406,096	981,158
2022/2021	913,681	1,072,669
2021/2020	983,549	282,371
2020/2019 and Prior	1,399,453	1,245,883
Revolving	804,088	661,088
Revolving-Term	139,504	123,611
Total Loans	5,816,761	5,510,956
2025/2024, Current period gross charge-offs		93
2024/2023, Current period gross charge-offs		43
2023/2022, Current period gross charge-offs	1,858
2022/2021, Current period charge-offs	446	2,088
2021/2020, Current period gross charge-offs		241
2020/2019 and Prior, Current period gross charge-offs	49	3,294
Revolving term gross charge-offs	27	47
Total Current Period Charge-offs	2,380	5,806
Pass [Member]
2025/2024	560,429	680,350
2024/2023	599,690	447,082
2023/2022	400,759	938,693
2022/2021	838,720	1,040,108
2021/2020	951,282	279,889
2020/2019 and Prior	1,325,641	1,171,697
Revolving	780,053	648,509
Revolving-Term	127,497	112,716
Total Loans	5,584,071	5,319,044
Special Mention [Member]
2024/2023		210
2023/2022	1,284
2022/2021	34,345	25,314
2021/2020	20,207
2020/2019 and Prior	22,381	20,559
Revolving	5,436
Revolving-Term	3,254	435
Total Loans	86,907	46,518
Substandard [Member]
2025/2024		10,307
2024/2023	10,271	6,227
2023/2022	4,053	42,465
2022/2021	40,616	7,247
2021/2020	12,060	2,482
2020/2019 and Prior	51,431	53,627
Revolving	18,599	12,579
Revolving-Term	8,753	10,449
Total Loans	145,783	145,383
Doubtful [Member]
Revolving-Term		11
Total Loans		11
Lease Financing [Member]
2025/2024	80,020	44,687
2024/2023	42,818	46,585
2023/2022	41,108	47,659
2022/2021	34,388	23,711
2021/2020	42,706	38,297
2020/2019 and Prior	31,990	21,558
Total Loans	273,030	222,497
Lease Financing [Member] \| Pass [Member]
2025/2024	80,020	43,887
2024/2023	42,818	46,585
2023/2022	40,307	47,659
2022/2021	34,388	23,711
2021/2020	42,706	38,297
2020/2019 and Prior	31,746	21,124
Total Loans	271,985	221,263
Lease Financing [Member] \| Substandard [Member]
2025/2024		800
2023/2022	801
2020/2019 and Prior	244	434
Total Loans	1,045	1,234
Construction [Member]
Total Loans	17,928	11,204
Residential Portfolio Segment [Member] \| Junior Lien [Member]
2025/2024		1,357
2024/2023		2,468
2023/2022	669	1,874
2022/2021	1,039	419
2021/2020	72	55
2020/2019 and Prior	836	2,409
Revolving	46,457	30,883
Revolving-Term	5,977	5,842
Total Loans	55,050	45,307
Residential Portfolio Segment [Member] \| Junior Lien [Member] \| Pass [Member]
2025/2024		1,357
2024/2023		2,468
2023/2022	669	1,874
2022/2021	1,039	419
2021/2020	72	55
2020/2019 and Prior	836	2,409
Revolving	46,346	30,792
Revolving-Term	5,976	5,841
Total Loans	54,938	45,215
Residential Portfolio Segment [Member] \| Junior Lien [Member] \| Substandard [Member]
Revolving	111	91
Revolving-Term	1	1
Total Loans	112	92
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member]
2025/2024	55,733	73,532
2024/2023	72,875	91,289
2023/2022	87,856	109,996
2022/2021	106,236	73,777
2021/2020	69,733	53,876
2020/2019 and Prior	238,190	200,500
Revolving		405
Revolving-Term	5,630	5,663
Total Loans	636,253	609,038
2024/2023, Current period gross charge-offs		43
Total Current Period Charge-offs		43
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member] \| Pass [Member]
2025/2024	55,733	73,532
2024/2023	72,875	90,214
2023/2022	86,490	109,903
2022/2021	106,144	73,777
2021/2020	69,733	53,434
2020/2019 and Prior	235,685	198,266
Revolving		405
Revolving-Term	5,630	5,663
Total Loans	632,290	605,194
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member] \| Substandard [Member]
2024/2023		1,075
2023/2022	1,366	93
2022/2021	92
2021/2020		442
2020/2019 and Prior	2,505	2,234
Total Loans	3,963	3,844
Residential Portfolio Segment [Member] \| Multifamily Property [Member]
2025/2024	80,125	29,275
2024/2023	25,487	51,583
2023/2022	51,309	469,528
2022/2021	434,805	621,444
2021/2020	613,827	117,288
2020/2019 and Prior	543,814	465,198
Revolving	735	1,950
Revolving-Term	44,752	43,488
Total Loans	1,794,854	1,799,754
2022/2021, Current period charge-offs		2,088
2020/2019 and Prior, Current period gross charge-offs		3,291
Total Current Period Charge-offs		5,379
Residential Portfolio Segment [Member] \| Multifamily Property [Member] \| Pass [Member]
2025/2024	80,125	29,275
2024/2023	25,487	51,583
2023/2022	51,309	456,162
2022/2021	410,982	602,288
2021/2020	589,893	117,288
2020/2019 and Prior	495,747	414,192
Revolving	735	1,950
Revolving-Term	44,752	43,488
Total Loans	1,699,030	1,716,226
Residential Portfolio Segment [Member] \| Multifamily Property [Member] \| Special Mention [Member]
2022/2021	12,029	11,961
2021/2020	11,926
2020/2019 and Prior	8,997	7,719
Total Loans	32,952	19,680
Residential Portfolio Segment [Member] \| Multifamily Property [Member] \| Substandard [Member]
2023/2022		13,366
2022/2021	11,794	7,195
2021/2020	12,008
2020/2019 and Prior	39,070	43,287
Total Loans	62,872	63,848
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Industrial [Member] \| Pass [Member]
2025/2024		425,315
2024/2023		127,304
2023/2022		133,067
2022/2021		132,237
2021/2020		10,760
2020/2019 and Prior		33,985
Revolving		537,844
Revolving-Term		12,554
Total Loans		1,413,066
Commercial Real Estate Portfolio Segment [Member] \| Commercial and Industrial [Member] \| Special Mention [Member]
2024/2023		210
2022/2021		12,205
2020/2019 and Prior		187
Revolving-Term		435
Total Loans		13,037
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member]
2025/2024	26,012	32,693
2024/2023	32,268	7,662
2023/2022	4,125	24,802
2022/2021	21,312	44,617
2021/2020	43,711	18,970
2020/2019 and Prior	109,257	127,991
Revolving	17,260	14,647
Revolving-Term	10,150	3,707
Total Loans	264,095	275,089
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member] \| Pass [Member]
2025/2024	26,012	32,693
2024/2023	32,268	7,662
2023/2022	4,125	24,802
2022/2021	21,312	43,469
2021/2020	43,711	18,970
2020/2019 and Prior	107,943	126,666
Revolving	16,760	14,647
Revolving-Term	10,150	3,707
Total Loans	262,281	272,616
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member] \| Special Mention [Member]
2022/2021		1,148
2021/2020	0
Revolving	500
Total Loans	500	1,148
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member] \| Substandard [Member]
2020/2019 and Prior	1,314	1,325
Total Loans	1,314	1,325
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member]
2025/2024	67,721	39,906
2024/2023	43,211	123,864
2023/2022	117,098	179,399
2022/2021	176,787	136,994
2021/2020	92,257	55,551
2020/2019 and Prior	443,676	385,629
Revolving	22,310	18,473
Revolving-Term	38,935	38,620
Total Loans	1,001,995	978,436
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member] \| Pass [Member]
2025/2024	67,721	39,906
2024/2023	43,211	123,864
2023/2022	117,098	169,645
2022/2021	144,780	136,994
2021/2020	92,257	55,551
2020/2019 and Prior	429,405	371,046
Revolving	22,310	18,473
Revolving-Term	38,935	38,620
Total Loans	955,717	954,099
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member] \| Special Mention [Member]
2022/2021	22,316
2020/2019 and Prior	12,341	12,653
Total Loans	34,657	12,653
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member] \| Substandard [Member]
2023/2022		9,754
2022/2021	9,691
2020/2019 and Prior	1,930	1,930
Total Loans	11,621	11,684
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
2025/2024	172,894	435,622
2024/2023	380,185	131,866
2023/2022	103,931	152,319
2022/2021	139,114	144,494
2021/2020	121,064	12,800
2020/2019 and Prior	28,827	38,589
Revolving	653,483	550,328
Revolving-Term	31,328	23,448
Total Loans	1,630,826	1,489,466
2025/2024, Current period gross charge-offs		93
2023/2022, Current period gross charge-offs	1,858
2022/2021, Current period charge-offs	446
2021/2020, Current period gross charge-offs		241
2020/2019 and Prior, Current period gross charge-offs	45
Revolving term gross charge-offs		11
Total Current Period Charge-offs	2,349	345
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member] \| Pass [Member]
2025/2024	172,894
2024/2023	369,914
2023/2022	100,761
2022/2021	120,075
2021/2020	112,731
2020/2019 and Prior	21,416
Revolving	630,059
Revolving-Term	19,322
Total Loans	1,547,172
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member] \| Special Mention [Member]
2023/2022	1,284
2021/2020	8,281
2020/2019 and Prior	1,043
Revolving	4,936
Revolving-Term	3,254
Total Loans	18,798
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member] \| Substandard [Member]
2025/2024		10,307
2024/2023	10,271	4,352
2023/2022	1,886	19,252
2022/2021	19,039	52
2021/2020	52	2,040
2020/2019 and Prior	6,368	4,417
Revolving	18,488	12,484
Revolving-Term	8,752	10,448
Total Loans	64,856	63,352
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member] \| Doubtful [Member]
Revolving-Term		11
Total Loans		11
Commercial Portfolio Segment [Member] \| Construction [Member]
Revolving	17,928	11,204
Total Loans	17,928	11,204
Commercial Portfolio Segment [Member] \| Construction [Member] \| Pass [Member]
Revolving	17,928	11,204
Total Loans	17,928	11,204
Consumer and Other [Member]
2025/2024	77,924	31,687
2024/2023	13,117	100
2023/2022		4,943
2022/2021		3,265
2021/2020	179	120
2020/2019 and Prior	2,863	4,009
Revolving	45,915	33,198
Revolving-Term	2,732	2,843
Total Loans	142,730	80,165
2020/2019 and Prior, Current period gross charge-offs	4	3
Revolving term gross charge-offs	27	36
Total Current Period Charge-offs	31	39
Consumer and Other [Member] \| Pass [Member]
2025/2024	77,924	31,687
2024/2023	13,117	100
2023/2022		4,943
2022/2021		3,265
2021/2020	179	120
2020/2019 and Prior	2,863	4,009
Revolving	45,915	33,194
Revolving-Term	2,732	2,843
Total Loans	$ 142,730	80,161
Consumer and Other [Member] \| Substandard [Member]
Revolving		4
Total Loans		$ 4

Financing receivable revolving term gross charge offs

No definition available.

Name:	pgc_FinancingReceivableRevolvingTermGrossChargeOffs
Namespace Prefix:	pgc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

Name:	us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of financing receivable that can be withdrawn, repaid, and redrawn.

+ References

+ Details

Name:	us-gaap_FinancingReceivableRevolving
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of revolving financing receivable converted to term loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6A

+ Details

Name:	us-gaap_FinancingReceivableRevolvingConvertedToTermLoan
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of writeoff of revolving financing receivable converted to term loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6A

+ Details

Name:	us-gaap_FinancingReceivableRevolvingConvertedToTermLoanWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of writeoff of financing receivable originated four years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of writeoff of financing receivable originated three years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of writeoff of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of writeoff of financing receivable originated two years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of writeoff of financing receivable originated in fiscal year before current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-7A

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-29

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (1)
-Publisher SEC

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (2)
-Publisher SEC

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-K (SK)
-Number 229
-Section 1404
-Paragraph a
-Publisher SEC

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 80
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-80

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-14

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

+ Details

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_LeaseAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LienCategoryAxis=us-gaap_JuniorLienMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pgc_PrimaryResidentialMortgagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pgc_MultifamilyPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CommercialAndIndustrialSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pgc_OwnerOccupiedPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pgc_InvestmentPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: